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<p>The authors investigate the patterns of martensitic transformation during quenching of sintered steels containing ultrafine particles. The presence of porosity in sintered steels was found to accelerate the process of martensitic transformation due to the facilitated nucleation of martensite on the pore surfaces and the lower resistance of porous austenite to transformation deformations. As a&#xa0;result, an increase in porosity leads to an increase in the martensite start temperature. At the same time, the introduction of ultrafine particles does not affect the martensite start temperature.</p>

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Martensitic transformation in sintered powder steels with ultrafine particles

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • M. S. Egorov,
  • R. V. Egorova

摘要

The authors investigate the patterns of martensitic transformation during quenching of sintered steels containing ultrafine particles. The presence of porosity in sintered steels was found to accelerate the process of martensitic transformation due to the facilitated nucleation of martensite on the pore surfaces and the lower resistance of porous austenite to transformation deformations. As a result, an increase in porosity leads to an increase in the martensite start temperature. At the same time, the introduction of ultrafine particles does not affect the martensite start temperature.